<?php

/*
 * This file is part of SwiftMailer.
 * (c) 2004-2009 Chris Corbyn
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

/**
 * Handles LOGIN authentication.
 *
 * @package    Swift
 * @subpackage Transport
 * @author     Chris Corbyn
 */
class Swift_Transport_Esmtp_Auth_LoginAuthenticator implements Swift_Transport_Esmtp_Authenticator
{
	/**
	 * Get the name of the AUTH mechanism this Authenticator handles.
	 *
	 * @return string
	 */
	public function getAuthKeyword()
	{
		return 'LOGIN';
	}

	/**
	 * Try to authenticate the user with $username and $password.
	 *
	 * @param Swift_Transport_SmtpAgent $agent
	 * @param string $username
	 * @param string $password
	 *
	 * @return boolean
	 */
	public function authenticate(Swift_Transport_SmtpAgent $agent, $username, $password)
	{
		try {
			$agent->executeCommand("AUTH LOGIN\r\n", array(334));
			$agent->executeCommand(sprintf("%s\r\n", base64_encode($username)), array(334));
			$agent->executeCommand(sprintf("%s\r\n", base64_encode($password)), array(235));

			return true;
		} catch (Swift_TransportException $e) {
			$agent->executeCommand("RSET\r\n", array(250));

			return false;
		}
	}
}
